/// <summary>
/// Method to handle inline replacement of style tag by opening style definition.
/// </summary>
/// <param name="sourceText"></param>
/// <param name="srcIndex"></param>
/// <param name="srcOffset"></param>
/// <param name="charBuffer"></param>
/// <param name="writeIndex"></param>
/// <param name="styleStack"></param>
/// <returns></returns>
static bool ReplaceOpeningStyleTag(ref string sourceText, int srcIndex, out int srcOffset, ref int[] charBuffer, ref int writeIndex, ref RichTextTagStack <int> styleStack)
{
// Validate <style> tag.
int hashCode = GetTagHashCode(ref sourceText, srcIndex + 7, out srcOffset);
TextStyle style = TextStyleSheet.GetStyle(hashCode);
// Return if we don't have a valid style.
if (style == null || srcOffset == 0)
{
return(false);
}
styleStack.Add(style.hashCode);
int styleLength = style.styleOpeningTagArray.Length;
// Replace <style> tag with opening definition
int[] openingTagArray = style.styleOpeningTagArray;
for (int i = 0; i < styleLength; i++)
{
int c = openingTagArray[i];
if (c == 60)
{
if (IsTagName(ref openingTagArray, "<BR>", i))
{
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = 10;
writeIndex += 1;
i += 3;
continue;
}
if (IsTagName(ref openingTagArray, "<STYLE=", i))
{
int offset;
if (ReplaceOpeningStyleTag(ref openingTagArray, i, out offset, ref charBuffer, ref writeIndex, ref styleStack))
{
i = offset;
continue;
}
}
else if (IsTagName(ref openingTagArray, "</STYLE>", i))
{
ReplaceClosingStyleTag(ref charBuffer, ref writeIndex, ref styleStack);
// Strip </style> even if style is invalid.
i += 7;
continue;
}
}
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = c;
writeIndex += 1;
}
return(true);
}
/// <summary>
/// Method to handle inline replacement of style tag by closing style definition.
/// </summary>
/// <param name="charBuffer"></param>
/// <param name="writeIndex"></param>
/// <param name="styleStack"></param>
/// <returns></returns>
static void ReplaceClosingStyleTag(ref int[] charBuffer, ref int writeIndex, ref RichTextTagStack <int> styleStack)
{
// Get style from the Style Stack
int hashCode = styleStack.CurrentItem();
TextStyle style = TextStyleSheet.GetStyle(hashCode);
styleStack.Remove();
// Return if we don't have a valid style.
if (style == null)
{
return;
}
int styleLength = style.styleClosingTagArray.Length;
// Replace <style> tag with opening definition
int[] closingTagArray = style.styleClosingTagArray;
for (int i = 0; i < styleLength; i++)
{
int c = closingTagArray[i];
if (c == 60)
{
if (IsTagName(ref closingTagArray, "<BR>", i))
{
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = 10;
writeIndex += 1;
i += 3;
continue;
}
if (IsTagName(ref closingTagArray, "<STYLE=", i))
{
int offset;
if (ReplaceOpeningStyleTag(ref closingTagArray, i, out offset, ref charBuffer, ref writeIndex, ref styleStack))
{
i = offset;
continue;
}
}
else if (IsTagName(ref closingTagArray, "</STYLE>", i))
{
ReplaceClosingStyleTag(ref charBuffer, ref writeIndex, ref styleStack);
// Strip </style> even if style is invalid.
i += 7;
continue;
}
}
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = c;
writeIndex += 1;
}
}
/// <summary>
/// Method to store the content of a string into an integer array.
/// </summary>
/// <param name="sourceText"></param>
/// <param name="charBuffer"></param>
/// <param name="styleStack"></param>
/// <param name="generationSettings"></param>
public static void StringToCharArray(string sourceText, ref int[] charBuffer, ref RichTextTagStack <int> styleStack, TextGenerationSettings generationSettings)
{
if (sourceText == null)
{
charBuffer[0] = 0;
return;
}
if (charBuffer == null)
{
charBuffer = new int[8];
}
// Clear the Style stack.
styleStack.SetDefault(0);
int writeIndex = 0;
for (int i = 0; i < sourceText.Length; i++)
{
if (sourceText[i] == 92 && sourceText.Length > i + 1)
{
switch ((int)sourceText[i + 1])
{
case 85: // \U00000000 for UTF-32 Unicode
if (sourceText.Length > i + 9)
{
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = GetUtf32(sourceText, i + 2);
i += 9;
writeIndex += 1;
continue;
}
break;
case 92: // \ escape
if (!generationSettings.parseControlCharacters)
{
break;
}
if (sourceText.Length <= i + 2)
{
break;
}
if (writeIndex + 2 > charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = sourceText[i + 1];
charBuffer[writeIndex + 1] = sourceText[i + 2];
i += 2;
writeIndex += 2;
continue;
case 110: // \n LineFeed
if (!generationSettings.parseControlCharacters)
{
break;
}
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = (char)10;
i += 1;
writeIndex += 1;
continue;
case 114: // \r
if (!generationSettings.parseControlCharacters)
{
break;
}
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = (char)13;
i += 1;
writeIndex += 1;
continue;
case 116: // \t Tab
if (!generationSettings.parseControlCharacters)
{
break;
}
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = (char)9;
i += 1;
writeIndex += 1;
continue;
case 117: // \u0000 for UTF-16 Unicode
if (sourceText.Length > i + 5)
{
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = (char)GetUtf16(sourceText, i + 2);
i += 5;
writeIndex += 1;
continue;
}
break;
}
}
// Handle UTF-32 in the input text (string). // Not sure this is needed //
if (Char.IsHighSurrogate(sourceText[i]) && Char.IsLowSurrogate(sourceText[i + 1]))
{
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = Char.ConvertToUtf32(sourceText[i], sourceText[i + 1]);
i += 1;
writeIndex += 1;
continue;
}
//// Handle inline replacement of <stlye> and <br> tags.
if (sourceText[i] == 60 && generationSettings.richText)
{
if (IsTagName(ref sourceText, "<BR>", i))
{
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = 10;
writeIndex += 1;
i += 3;
continue;
}
if (IsTagName(ref sourceText, "<STYLE=", i))
{
int srcOffset;
if (ReplaceOpeningStyleTag(ref sourceText, i, out srcOffset, ref charBuffer, ref writeIndex, ref styleStack))
{
i = srcOffset;
continue;
}
}
else if (IsTagName(ref sourceText, "</STYLE>", i))
{
ReplaceClosingStyleTag(ref charBuffer, ref writeIndex, ref styleStack);
// Strip </style> even if style is invalid.
i += 7;
continue;
}
}
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = sourceText[i];
writeIndex += 1;
}
if (writeIndex == charBuffer.Length)
{
ResizeInternalArray(ref charBuffer);
}
charBuffer[writeIndex] = (char)0;
}
